Detachable boiler-flue.



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JULIAN F. DRAIIE, OF HOLLY, MINNESOTA.

DETACHABLE BOlLEHmFLUE.

SIECIFICATION forming part O Letters Patent No. 696,421, dated April 1, 1902. Application liled March 26, 1901. Serial No. 52,904, (No model.)

T0 all whom t may concern:

Be it known that I, JULIAN F. BRAKE, a citizen ofthe United States, residing at Holly, in the county of Murray and State of Minnesota, have invented certain new and useful Improvements in Detachable Boiler-Flues; and I do hereby declare the following to be a ful1, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved means for detachably securing boiler-dues; and to this end it consists of the novel devices and combinations of devices hereinafter described, and defined in the claim.

My invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Figure l is a vertical section taken centrally through a boiler the iiues of which are detachably secured in accordance with myinvention; and Fig. 2 is an enlarged view with parts broken away and some parts in section, showing a flue and the means fordetachably securing the same to the flue-sheets.

The numeral l indicates a boiler of ordinary construction having the flue-sheets 2. Y

The numeral 3 indicates .the 'lues, the ends of which are screw-threaded, as shown at 4t. On one end of each flue is screwed a sleeve 5, the outersurface of which is slightly tapered. On the other end of each iiue is screwed a flanged clamping-collar 6,which quite loosely fits in an enlarged flue-passage 7l of the adjacent flue-sheet 2. The sleeve 5 is provided with a brass or copper sleeve-like jacket 8, which is also tapered. The said sleeve or jacket S lits in a slightly-tapering seat 9 in the adjacent line-sheet 2. On the flanged collar G, between the flue-sheet 2 and iiange thereof, is loosely mounted a packing-rin g 10, which is grooved and provided with an annular packing ll, of asbestos or similar inaterial.

To remove aflue orto place one in working position,the flanged collar G should be removed, or said collar G may simply be loosened and the sleeves 5 then removed. Vhen the said flanged collar G is screwed up so as to tightly draw the tapered jacket 8 into the tapered seat in the flue-seat, a steam-tight joint is there formed, and the asbestos packing l1 is compressed so that it forms a steamtight joint between the flue-sheet and its reduced portion of the said collar 6. With the loose packing-ring 10 the collar (i` may be turned to tighten up the flue-joints Without turning the said ring and packing with respect to the adjacent due-sheet. With the above construction the lues may be quickly and easily removed for the purposes of cleaning and may with equal ease and rapidity be replaced in working position. This, as is also evident, may be accomplished without damaging the flue or destroying the parts.

The reason for frequently removing the Iiues is, as is well known, to clean the same of scale, which forms on the outside thereof and thus destroys the heat-radiating capacity of the flues. In alkali districts it is frequently necessary to remove the dues of a threshing-engine boiler, for instance, once in six weeks, or even oftener.

As is evident, with the above construction the fines may be easily drawn from the boiler,

even though covered with a thick scale, in-

asmuch as the fine-passages in the nue-sheets are materially larger than the said iiues.

It will be of course understood that the invention above described is capable of considerable modilication.

What I claim, and desire to secure by Letters Patent ofthe United States, is as follows:

In a boiler, the combination with a detachable line, of a nut working with screwthreaded engagement on the outer end ol' said iiue, and the clamping-ring l0 surrounding said tlue between said nut and the Iiuesheet, which clamping-ring is provided with the annularpacking-ring ll of relatively soft lireproof material, exposed for contact with the flue-sheet and with the part which it directly surrounds, substantially as described.

In testimony whereof I afx my signature in presence of two witnesses.

JULIAN F. BRAKE.

Witnesses:

MABEL M. MGGRORY, F. D. MERCHANT. 

